9 1/4" overall. 524 lumens. OD green stealth matte anodized aluminum construction. Fast focusing. Spot to flood with 1/4 turn of the head. Quick Click system to access: High power mode (524 lumens), Low power mode (143 lumens), Eco mode (58 lumens-with run time of 69 hours), Momentary mode and Strobe mode. Impact resistant to 1m. Aggressive knurled design. Uses 2 cell D batteries (not included).